Mineral Based Human Made Alloy

Stainless Steel Spoon

Iron-Chromium Alloy (Fe + Cr + Ni)

Not a geological specimen

N/A (man-made object)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Gold coin pendant on a chain

Gold (Au), likely a coin set in a gold-colored metal mount

Rose Gold (Copper-Gold Alloy)

Aurum-Cuprum Alloy (Au-Cu)

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Sea Glass

Man-made vitreous material (silica-based glass)

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Concrete rubble

Anthropogenic conglomerate

Gem-set gold ring

Gold alloy setting with a colorless faceted gemstone, possibly quartz or glass; the stone cannot be identified reliably from the image

Native Silver

Silver (Ag)

Diamond-set gold ring

Diamond (crystalline carbon, C) in a gold alloy setting

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Note: Item is not a geological specimen

Homo sapiens (Dermal Appendage: Pilus)

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Diamond-set gold ring or ring component

Diamond (crystalline carbon, C); gold alloy setting (Au)

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Industrial Slag

Anthropogenic Vitreous Slag

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Diamond-set gold ring

Diamond (carbon, C) in a gold alloy setting; the clear center stone may be a diamond or a diamond simulant

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Red Painted Rock

Artificial Coated Lithic Fragment

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Opalite (likely man-made glass)

Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives

Asphalt Concrete

Bituminous Concrete

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Inlaid stone ring (likely jasper or agate)

Likely microcrystalline quartz (chalcedony, SiO₂), possibly jasper, with decorative mineral inlays

Gem-set gold ring

Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Painted Sandstone

Sandstone (clastic sedimentary rock) with acrylic/artistic coating